X-GM-THRID: 1212170039215454192 X-Gmail-Labels: rsgb lf X-Gmail-Received: 616588f1f8c230d8c1d12697d385c15ce6877b49 Delivered-To: daveyxm@gmail.com Received: by 10.64.249.16 with SMTP id w16cs132136qbh; Sun, 20 Aug 2006 12:42:47 -0700 (PDT) Received: by 10.49.10.3 with SMTP id n3mr6853641nfi; Sun, 20 Aug 2006 12:42:46 -0700 (PDT) Return-Path: Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mx.gmail.com with ESMTP id d2si4265nfe.2006.08.20.12.42.46; Sun, 20 Aug 2006 12:42:46 -0700 (PDT) Received-SPF: neutral (gmail.com: 193.82.116.20 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1GEt71-0000RO-C6 for rs_out_1@blacksheep.org; Sun, 20 Aug 2006 20:37:35 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1GEt70-0000RF-FU for rsgb_lf_group@blacksheep.org; Sun, 20 Aug 2006 20:37:34 +0100 Received: from smtp.telefonica.net ([213.4.149.66] helo=ctsmtpout4.frontal.correo) by relay1.thorcom.net with esmtp (Exim 4.62) (envelope-from ) id 1GEt6l-0002ns-AD for rsgb_lf_group@blacksheep.org; Sun, 20 Aug 2006 20:37:34 +0100 Received: from p1800 (217.127.130.21) by ctsmtpout4.frontal.correo (7.2.056.6) (authenticated as 943452288234280$telefonica.net) id 44C4D0A4002260E2 for rsgb_lf_group@blacksheep.org; Sun, 20 Aug 2006 21:37:18 +0200 Message-ID: <000f01c6c490$4b9616e0$0301a8c0@p1800> From: "Federico Olaizola" To: References: <20060819.164627.3204.4.riese-k3djc@juno.com> Date: Sun, 20 Aug 2006 21:39:01 +0200 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1158 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 X-Spam-Score: -1.2 (-) X-Spam-Report: autolearn=disabled,AWL=-1.372,FORGED_RCVD_HELO=0.05,HTML_50_60=0.095,HTML_MESSAGE=0.001 Subject: Re: LF: TIP: modifiying X-tals Content-Type: multipart/alternative; boundary="----=_NextPart_000_000C_01C6C4A1.0D3C1D20" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.9 required=5.0 tests=HTML_30_40,HTML_MESSAGE, MAILTO_TO_SPAM_ADDR autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false Status: O X-Status: X-Keywords: X-UID: 7043 This is a multi-part message in MIME format. ------=_NextPart_000_000C_01C6C4A1.0D3C1D20 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I work the FT-243 Xtals and similars with ammonical bifluoride acid = (FH-FNH4), much less aggressive that the fluorhydric acid (FH) I utilize two disolutions marked as 5khz/10_min and 1,5khz/30_min. This = is a reference, therefore each Xtal takes the velocity that desires him. At each one, must do attack velocity test. When you approach the = frequency desired, the bath should be of more short term and whit = measurement. To bathe the Xtal, I utilize pincers of revealed photographics, wing = that have carried out channels filed near the tip for take the Xtal so = that the flat faces remain free for the attack of the acid. My record of variation of a Xtal of 8 mhz is 403 khz obtaineds in 10 = days of baths. 8.377 to 8.780,8 =3D> 137,200 If we have passed ourselves in frequency, at Xtal "injured", applies him = itsel, "mercury-chrome" whit a human air. ( Edding pen?) If the bath, as been long-term, is possible that the Xtal to stop = oscilating. In this case, to smooth the surface, I utilize abrasive = paste of "corindon-corundum". Also is worth te dentifrice-paste. As = base of support, I utilize a piece of flat glass. The flask of the disolutions should be of special plastic for chemitry. = The fluorhydric acids (also the bifluoride), they attack the glass. A 20% of my Xtals they have died in the operation, well because in the = in the maneuvers of dismantling-assemblyng, they have broken itself or = because to stop oscillating and there is not form to resurrect them. Each time that there is a session of bath, one must wash the Xtal with = soap and running water and to dry it with absorbent paper. A lot of attention, therefore we are working with higly corrosive = material.=20 =20 Federico EA2HB ----- Original Message -----=20 From: riese-k3djc@juno.com=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Saturday, August 19, 2006 10:38 PM Subject: Re: LF: TIP: modifiying X-tals In the ol days we would use a pencil or rub a bit of solder on the = face real hams used ? acid to etch and raise the frequency,, I dont = remember what the acid was but the local chemical company would sell a bit drill a hole in the mount face, tap it and use a screw to apply pressure and move the frequency around Bob K3DJC=20 On Sat, 19 Aug 2006 21:16:13 +0200 "Dick" writes: For those who didn't know, use following 'trick' to tune your own = X-tal. (found it in a magazine from the VERON) Take an permant marker pen ("Edding, or similar) and put a little = stripe/line on the X-tal plate. You will notice that the frequency goes down a bit. ------=_NextPart_000_000C_01C6C4A1.0D3C1D20 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
I work the FT-243 Xtals and similars = with ammonical=20 bifluoride acid (FH-FNH4), much less aggressive that the fluorhydric = acid=20 (FH)
 
I utilize two disolutions marked as = 5khz/10_min and=20 1,5khz/30_min. This is a reference, therefore each Xtal takes the = velocity that=20 desires him.
 
At each one, must do attack velocity = test. =20 When you approach the frequency desired, the bath should be of more = short term=20 and whit  measurement.
To bathe the Xtal, I utilize pincers of = revealed=20 photographics, wing that have carried out channels filed near the tip = for take=20 the Xtal so that the flat faces remain free for the attack of the=20 acid.
 
My record of variation of a Xtal of 8 = mhz is 403=20 khz  obtaineds in 10 days of baths.
          &nbs= p;            = ;     =20 8.377  to  8.780,8  =3D>  137,200
 
If we have passed ourselves in = frequency, at=20 Xtal "injured", applies him itsel, "mercury-chrome" whit a human = air. =20 ( Edding pen?)
 
If the bath, as been long-term, is = possible that=20 the Xtal to stop oscilating.   In this case, to smooth the = surface, I=20 utilize abrasive paste of "corindon-corundum". Also is worth te=20 dentifrice-paste.  As base of = support, I=20 utilize a piece of flat glass.
 
The flask of the disolutions should be = of special=20 plastic for chemitry. The fluorhydric acids (also the bifluoride),  = they=20 attack the glass.
 
A 20% of my Xtals they have died in the = operation,=20 well because in the in the maneuvers of dismantling-assemblyng, they = have broken=20 itself or because to stop oscillating and there is not form to resurrect = them.
 
Each time that there is a session of = bath, one must=20 wash the Xtal with soap and running water and to dry it with absorbent=20 paper.
 
A lot of attention, therefore we are = working with=20 higly corrosive material. 
 
Federico   EA2HB
 
----- Original Message -----
From:=20 riese-k3djc@juno.com
Sent: Saturday, August 19, 2006 = 10:38=20 PM
Subject: Re: LF: TIP: = modifiying=20 X-tals

In the ol days we would use a pencil or rub a bit of solder on = the=20 face
real hams used ? acid to etch and raise the frequency,, I dont=20 remember
what the acid was but the local chemical company would = sell a=20 bit
 
drill a hole in the mount face, tap it and use a screw to = apply
pressure and move the frequency around
 
Bob K3DJC 
 
 
On Sat, 19 Aug 2006 21:16:13 +0200 "Dick" <knaap159@zonnet.nl> = writes:
For those who didn't know, use = following=20 'trick' to tune your own X-tal.  (found it in a magazine from = the=20 VERON)
 
Take an permant marker pen = ("Edding, or=20 similar) and put a little stripe/line on the X-tal = plate.
You will notice that the frequency = goes down a=20 bit.
------=_NextPart_000_000C_01C6C4A1.0D3C1D20--